<!DOCTYPE html>
<html lang="en" xmlns:https="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link href="css/bootstrap.css" rel="stylesheet">
    <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.slim.js"></script>
    <script src="js/bootstrap.js"></script>
</head>
<body>
<div class="col-lg-12" style="height: 150px;"></div>
<span class="glyphicon glyphicon-fire " aria-hidden="true" style="color: red"/>
<span class="glyphicon glyphicon-search" aria-hidden="true"/>
<br>

</div>
<div class="col-lg-4">
    <div class="col-lg-2"></div>
    <div class="col-lg-8">
        <form>
            <div class="col-lg-4" style="text-align: right">
                <label>用户名:</label>
            </div>
            <div class="col-lg-8"><input class="form-control"></div>
            <input type="file">
            <br><br>
            <input type="radio">
            <textarea class="form-control"></textarea>
            <input class="form-control " readonly>
            <input type="button" class="btn btn-default" value="default">
            <br><br>
            <input type="button" class="btn btn-primary" value="primary">
            <br><br>
            <input type="button" class="btn btn-warning" value="warning">
            <br><br>
            <input type="button" class="btn btn-info" value="info">
            <br><br>
            <input type="button" class="btn btn-danger" value="danger">
            <br><br>
            <input type="button" class="btn btn-success" value="success">
            <br>
            <br>

        </form>
    </div>
    <div class="col-lg-2"></div>
</div>
<div class="col-lg-4"><input type="button" class="btn btn-success btn-xs" value="success">
    <input type="button" class="btn btn-success btn-sm" value="success ">
    <input type="button" class="btn btn-success " value="success">
    <input type="button" class="btn btn-success btn-lg " value="success">
    <br>
    <a class="btn btn-success ">这是一个A标签</a>
    <br>
    <button class="btn btn-danger btn-block disabled">button</button>
    <button class="btn btn-danger btn-block active">button</button>
    <br>
    <img class="img-thumbnail" src="1.jpg" style="width: 60%;">
    <img class="img-rounded" src="1.jpg" style="width: 60%;">
    <img class="img-circle" src="1.jpg" style="width: 60%;">
</div>
</body>
</html>